Xem 1-20 trên 22 kết quả Spatial resolution
  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Video Transcoder in DCT-Domain Spatial Resolution Reduction Using Low-Complexity Motion Vector

    pdf15p sting09 21-02-2012 12 2   Download

  • It becomes more important to obtain medical ultrasound images with higher signal-to-noise ratio (SNR) and higher spatial resolution. In the last decade, tissue harmonic imaging (THI) and coded excitation to medical ultrasound imaging have been investigated.

    pdf17p thaodien102 06-11-2015 7 2   Download

  • Digital Image Processing: Human Visual System - Duong Anh Duc presents about Human Visual System; Cross-section of the Human Eye; Light and EM Spectrum; Image Sensing and Acquisition; Mathematical Representation of Images; Effect of spatial resolution; Application Areas.

    ppt21p cocacola_08 21-11-2015 4 1   Download

  • (BQ) Part 2 book "MRI at a glance" presentation of content: Data acquisition and scan time, signal to noise ratio, spatial resolution, magnetic susceptibility, flow phenomena, phase contrast MR angiography, phase contrast MR angiography, contrast enhanced MR angiography, screening and safety procedures,...

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  • Since its first implementation by Lauterbur [1], Magnetic Resonance Imaging (MRI) has become an important noninvasive imaging modality. MRI has found a number of applications in the fields of biology, engineering, and material science. Because it provides unique contrast between soft tissues (which is generally superior to that of CT) and high spatial resolution, MRI has revolutionized diagnostic imaging in medical science. An important advantage of diagnostic MRI as compared to CT is that the former does not use ionizing radiation....

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  • The evolution of technological advances in infrared sensor technology, image processing, “smart” algorithms, knowledge-based databases, and their overall system integration has resulted in new methods of research and use in medical infrared imaging. The development of infrared cameras with focal plane arrays not requiring cooling added a new dimension to this modality. New detector materials with improved thermal sensitivity are now available and production of high-density focal plane arrays (640×480) has been achieved.

    pdf451p echbuon 02-11-2012 31 9   Download

  • Aquatic scientists have always been intrigued with concepts of scale. This interest perhaps stems from the nature of ßuid dynamics in oceans and lakes — energy cascades from spatial scales of kilometers down to viscous scales at centimeters or less. Turbulent processes affect not only an organism’s perception of, and response to, the physical environment, but also the interaction between species, both within and across trophic levels.

    pdf0p 951628473 07-05-2012 40 8   Download

  • Medina et al. Nanoscale Research Letters 2011, 6:369 http://www.nanoscalereslett.com/content/6/1/369 NANO EXPRESS Open Access Hyperspectral optical imaging of two different species of lepidoptera José Manuel Medina1*, Sérgio Miguel Cardoso Nascimento1 and Pete Vukusic2 Abstract In this article, we report a hyperspectral optical imaging application for measurement of the reflectance spectra of photonic structures that produce structural colors with high spatial resolution.

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  • These disorders are caused by maturational white matter abnormalities and therefore white matter tractography (using DTI) can offer advantages over conventional MRI in the detectability of clinically relevant microstructural features. High field strength structural MR scanning (up to 7 tesla for clinical and research use in humans) is now available in some countries, and this greatly enhances the spatial resolution over that offered by standard clinical facilities (typically 1.5 or 3 tesla).

    pdf470p wqwqwqwqwq 21-07-2012 38 7   Download

  • In our quest to elucidate the origin of the universe and the formation of galaxies, particularly that of the Milky Way in which we live, astounding progress has been made in recent years through observational and theoretical studies. Not only have gigantic surveys covering a large fraction of the sky brought statistics enlightening evolutionary paths of galaxies, but powerful instruments, such as radio interferometers and ground- and space-based optical/ infrared telescopes, have been able to map individual objects with high sensitivity and spatial resolution.

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  • Schröder et al. Environmental Sciences Europe 2011, 23:19 http://www.enveurope.

    pdf14p dauphong13 10-02-2012 23 6   Download

  • We live in a time when digital information plays a key role in various fields. Whether we look towards communications, industry, medicine, scientific research or entertainment, we find digital images to be heavily employed. The high volume of stored and transacted digital images, together with the increasing availability of advanced digital image acquisition and display techniques and devices, came with a growing need for novel, fast and intelligent algorithms for the digital manipulation of digital images....

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  • Velocity encoded phase-contrast magnetic resonance imaging (VE-PC MRI) is another imaging technique used to noninvasively measure Achilles tendon strain and changes in its force-displacement relationship concomitant with chronic unloading and subsequent recuperation. This technique will be reviewed in terms of its ability to quantify the Achilles tendon Young’s modulus (MPa) from a stress-strain curve.

    pdf206p wqwqwqwqwq 21-07-2012 25 4   Download

  • This dissertation will outline solution processable materials and fabrication techniques to manufacture flexible electronic devices from them. Conductive ink formulations and inkjet printing of gold and silver on plastic substrates were examined. Line patterning and mask printing methods were also investigated as a means of selective metal deposition on various flexible substrate materials. These solution-based manufacturing methods provided deposition of silver, gold and copper with a controlled spatial resolution and a very high electrical conductivity.

    pdf0p quynho77 13-11-2012 18 3   Download

  • The invention of scanning tunneling microscope (STM) by Binnig and his colleagues in 1982 opened up the possibility of imaging material surfaces with spatial resolution much superior to the conventional microscopy techniques. The STM is the first instrument capable of directly obtaining three-dimensional images of solid surfaces with atomic resolution. Even though STM is capable of achieving atomic resolution, it can only be used on electrical conductors. This limitation has led to the invention of atomic force microscope (AFM) by Binnig and his co-workers in 1986.

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  • The cones function under daylight (photopic) conditions. The cone system is specialized for color perception and high spatial resolution. The majority of cones are located within the macula, the portion of the retina serving the central 10° of vision. In the middle of the macula a small pit termed the fovea, packed exclusively with cones, provides best visual acuity. Photoreceptors hyperpolarize in response to light, activating bipolar, amacrine, and horizontal cells in the inner nuclear layer. ...

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  • All higher organisms divide major biochemical steps into different cellular compartments and often use tissue-specific division of metabolism for the same purpose.Such spatial resolution is accompanied with temporal changes of meta-bolite synthesis in response to environmental stimuli or developmental needs.Although analyses of primary and secondary gene products, i.e. transcripts, proteins, and metabolites, regularly do not cope with this spatial and temporal resolution, these gene products are often observed to be highly coregulated forming complex networks....

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  • It is an exciting time for the discipline of cognitive neuroscience. In the past 10 years we have witnessed an explosion in the development and advancement of methods that allow us to precisely examine the neural mechanisms underlying cognitive processes. Functional magnetic resonance imaging, for example, has provided markedly improved spatial and temporal resolution of brain structure and function, which has led to answers to new questions, and the reexamination of old questions.

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  • Estimating the directions of arrival (DOAs) of propagating planewaves is a requirement ina variety of applications including radar, mobile communications, sonar, and seismology. Due to its simplicity and high-resolution capability, ESPRIT (Estimation of Signal Parameters via Rotational Invariance Techniques) [18] has become one of the most popular signal subspace-basedDOAor spatial frequency estimation schemes. ESPRIT is explicitly premised on a point source model for the sources and is restricted to use with array geometries that exhibit so-called invariances [18]....

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  • The recent introduction of Multidetector Computed Tomography (MDCT) represents a milestone in the evolution of Computed Tomography, that started in the decade of 1970. Faster velocities of acquisition, higher spatial and temporal resolution, and better image quality are advantages of MDCT over the former singleslice systems that allow the development of cardiac applications on a realistic basis.

    pdf136p echbuon 02-11-2012 25 6   Download

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